State, county and federal police agencies in connection with the state Attorney General's Office have raided 22 properties in Wayne, Oakland, Washtenaw and Jackson counties at the conclusion of a seven-month investigation into illegal marijuana cultivation and sales.

The investigation yielded over 500 plants, "a large quantity of processed marijuana," multiple weapons and "several" arrests, according to a press release issued by the state police Monday.

Police targeted private businesses, homes and warehouses.

"One of the residences that was part of the investigation was the home in Ypsilanti that exploded" Sunday, state police said.

Law enforcers raided a two-story warehouse in Detroit at Tireman and Epworth Monday morning during which several individuals were handcuffed, and conducted additional searches at locations near 6 Mile and Van Dyke and 7 Mile and John R., according to this report by WXYZ, Channel 7 Action News in Detroit.